Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Basically I am trying to computer a MFCC and wondered if you can help.

This is the FFT of 1 of the Frames (After I have multiplied the Hamming Window by the Mel Bank Filters) :

enter image description here

Here is the DCT of the FFT of Frame 1:

enter image description here

I have read somewhere that I need to take 13 Coefficients from each frame in which I can then carry out a DTW algorithm to identify the signal. BUT why 13 and how do you extract these? I've read a paper that gives an equation to calculate the energy, however, this wouldn't produce 13 Coefficients when the Frame is 256 in length. So do I take the first 13 values, then, compute the total energy on each of the values? Refer to "Step 7" in paper enter link description here

Hope someone can help, thanks :)

share|cite|improve this question
Wouldn't it be better to ask on the SE about DSP? – Voyska Apr 9 '13 at 23:08

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.